hobuinc / usgs-lidar

AWS Entwine Point Tiles USGS LiDAR Public Dataset GitHub repo
https://registry.opendata.aws/usgs-lidar/
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resources.geojson boundaries do not match actual extent of the point clouds #67

Closed diego-gris closed 11 months ago

diego-gris commented 11 months ago

The project boundaries in the resources.geojson file do not match the extent of the point cloud. This causes issues when trying to determine the source of lidar data in the se boundaries because I would think I can get lidar data on those locations, but I end up with an empty point cloud. Is there a reason for these extra borders around the point clouds? Example below: point cloud vs. geojson boundaries in green.

image
connormanning commented 11 months ago

The boundaries are computed at quite a low resolution since there is so much data to analyze here. You could compute them for a given resource yourself if you need higher resolution - that code all runs in a github action so you can follow along with how these boundaries are generated and increase the resolution to something suitable for your use-case. If you know that your particular dataset is rectangular, you could also simply look at the extents in the ept.json metadata for that resource.